Download - Movable Bridge Resource
Town: Boothbay
WIN #: 22607.00
Date: 11/27/18
Special Provision 105 - 1
SPECIAL PROVISION
SECTION 105
General Scope of Work
(Environmental Requirements)
In-Water work consists of any activity conducted below the normal high water mark of a river, steam, brook,
lake, pond or “Coastal Wetland” areas that are subject to tidal action during the highest tide level for the year
which an activity is proposed as identified in the tide tables published by the National Ocean Service.
http://www.oceanservice.noaa.gov/ For the full definition of “Coastal Wetlands”, please refer to 38 MRSA
480-B(2)
I. In-Water work applies to the Back River the proposed bridge rehabilitation
a. In-water work below Highest Annual Tide Elevation (Elevation 6.2) is allowed from August 1 to
March 15 of any year.
b. In-water work below Highest Annual Tide Elevation (Elevation 6.2) between March 15 and June
30 is prohibited except for removal of cofferdams and removal of temporary bridge components.
c. In-water work below Highest Annual Tide Elevation (elevation 6.2) between July 1 and July 31
is prohibited
II. Work below the Highest Annual Tide Elevation (Elevation 6.2) completed in the dry may be completed
anytime.
III. Special Conditions for Pile Driving
1. In-water piles driven by impact hammer may not exceed the following pile sizes:
1. pipe pile: 30 inch
2. Steel H-pile: 14-inch
2. The contractor shall employ a soft start technique for all pile driving and pile removal. A “soft-start”
means that the hammer shall be operated at reduced power for 15 seconds at a 1-minute interval.
This procedure shall be repeated three times.
3. Pile driving shall be limited to 12 hours a day during daytime hours.
4. The contractor shall provide noise attenuation for all in-water pile driving with an impact hammer.
Noise attenuation includes passive measures such as changing hammer type, reducing driving
duration, reducing force settings on the hammer; and active measures. Active measures shall consist
of cushions and bubble curtains.
a. The contractor shall employ a bubble curtain for all in-water impact pile driving. The
bubble curtain shall meet the design specifications and performance requirements in the attached
Bubble Curtain Specification. The contractor shall complete a performance test of the bubble
curtain prior to any impact pile driving. The performance test shall confirm the calculated
pressures and flow rates at each manifold ring.
Town: Boothbay
WIN #: 22607.00
Date: 11/27/18
Special Provision 105 - 2
b. Payment for noise attenuation. The contractor shall be responsible for implementing noise
monitoring and noise attenuation as described above. Payment shall be made as a lump sum
under Pay Item 501.237 Noise Attenuation and Underwater Noise Monitoring.
IV. Special Conditions:
1. Special Conditions of Army Corps of Engineers (ACOE) Category II permit and Maine
Department of Environmental Protection Permit-by-Rule Standards apply (see permit and
conditions in contract documents).
2. Special Conditions of Informal Endangered Species Act (Section 7) and Essential Fish Habitat
Consultation with National Marine Fisheries Service apply (summarized in this Special Provision
105).
3. The contractor shall hold a pre-construction meeting for each project with appropriate
MaineDOT Environmental Office staff, other MaineDOT staff, and the MaineDOT construction
crew or contractor(s) to review all procedures and requirements for avoiding and minimizing
effects to Atlantic salmon and Sturgeon and to emphasize the importance of these measures for
protecting these species and their habitat. ACOE (Jay Clement, [email protected]),
FHWA (Cassandra Chase, [email protected] ) and National Marine Fisheries Service
staff (Zachary Jylkka, [email protected] ) shall be invited to attend these meetings.
4. The contractor shall contact Eric Ham of MaineDOT Environmental Office (207-215-7356,
[email protected]) at least two weeks prior to installation of each cofferdam. During the
closure of each cofferdam, i.e., the installation of the final sheetpile, a MaineDOT Environmental
Office Biologist shall be present on site. Dewatering shall not begin until the cofferdam is cleared
by the MaineDOT Biologist. The MaineDOT Biologist will visually monitor for the presence of
live, wounded, or dead fish and report to NOAA. If listed species are suspected or observed in the
cofferdam, all in-water activities shall cease while MaineDOT contacts NMFS.
5. Should the contractor see any ESA-listed species (Atlantic sturgeon, shortnose sturgeon, or
Atlantic salmon) or have any incidental contact, the contractor shall contact NMFS (Zachary
Jylkka: by email, [email protected] or phone (978) 282-8467 within 24 hours. If Zach is
unavailable, the contract shall contact the NMFS Section 7 Coordinator by phone (978) 281-9208 or
fax 978-281-9394). The contractor shall also notify MaineDOT Environmental Office (Eric Ham
215-7356).
6. Temporary abutments constructed below Highest Annual Tide elevation shall be
constructed with containment or in the dry. Containment may consist of a turbidity,
cofferdam, or other similar measure.
7. The contractor shall complete removal of the existing center pier and installation of the
new pier (Pier 2) within a cofferdam.
Town: Boothbay
WIN #: 22607.00
Date: 11/27/18
Special Provision 105 - 3
8. In-water activities that result in in-water noise greater than 150 dB RMS may not exceed 12
consecutive hours per 24 hour period. There must be 12 consecutive hours per 24-hour
period with no in-water noise in excess of 150 dB RMS.
9. All areas of temporary waterways or wetland fill shall be restored to their original contour and
character upon completion of the project.
10. Disturbed areas adjacent to the waterway shall be stabilized and re-vegetated with a seed mix
appropriate for riparian areas in Maine.
11. The Contractor shall follow measures designed to avoid and minimize effects to streams from
hazardous materials associated with construction activities. These measures include the
following:
a. All vehicle refueling shall occur more than 100 feet from any water course.
b. All vehicles carrying fuel shall have specific equipment and materials needed to contain
or clean up any incidental spills at the project site. Equipment and materials would include spill
kits appropriately sized for specific quantities of fuel, shovels, absorbent pads, straw bales,
containment structures and liners, and/or booms.
c. During use, all pumps and generators shall have appropriate spill containment structures
and/or absorbent pads in place.
d. All equipment used for in-stream work shall be cleaned of external oil, grease, dirt, and
mud. Any leaks or accumulations of these materials would be corrected before entering streams
or areas that drain directly to streams or wetlands.
V. Approvals:
1. Temporary Soil Erosion and Water Pollution Control Plan
2. Permitted Resource Impacts (in square feet), see ACOE permit for locations:
Coastal Wetland: 875
VI. All activities are prohibited (including placement and removal of cofferdams unless otherwise permitted by
Regulatory Agencies) below the normal high water mark if outside the prescribed in-water work window,
except for the following:
1. Work within a cofferdam constructed according to MaineDOT’s Standard Specifications and in
adherence with the contractors approved “Soil Erosion and Water Pollution Control Plan”.
2. Tidal exchange shall be maintained at all times.
NOTE: Regulatory Review and Approval is required to modify the existing In-Water work window. Requests
for work window extensions must be submitted to the MaineDOT Environmental Office. Approval of requests
for work window extensions is not guaranteed and may result in delays in construction schedule that are the sole
responsibility of the contractor.